{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63878", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.018Z", "datePublished": "2026-07-19T14:54:50.977Z", "dateUpdated": "2026-07-19T14:54:50.977Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:54:50.977Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO\n\nkvcalloc(args->num_entries, sizeof(*vm_entries), GFP_KERNEL) at\namdgpu_gem.c:1050 uses the user-supplied num_entries directly without\nany upper bounds check. Since num_entries is a __u32 and\nsizeof(drm_amdgpu_gem_vm_entry) is 32 bytes, a large num_entries\nproduces an allocation exceeding INT_MAX, triggering\nWARNING in __kvmalloc_node_noprof(), causing a kernel WARNING,\nTAINT_WARN, and panic on CONFIG_PANIC_ON_WARN=y systems.\n\nAdd a size bounds check before we invoke the kvzalloc() to\nreject oversized num_entries early with -EINVAL.\n\n(cherry picked from commit 1fe7bf5457f6efd7be60b17e23163ba54341d73d)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c"], "versions": [{"version": "4d82724f7f2b847eb0454b1aab5450545b39abd4", "lessThan": "f059b4c493df3e54fe3ffe4658009c31864275da", "status": "affected", "versionType": "git"}, {"version": "4d82724f7f2b847eb0454b1aab5450545b39abd4", "lessThan": "967a00b8e06a7734aded23861faba9ee2462be87", "status": "affected", "versionType": "git"}, {"version": "4d82724f7f2b847eb0454b1aab5450545b39abd4", "lessThan": "a1ba4594232c87c3b8defd6f89a2e40f8b08395d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da"}, {"url": "https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87"}, {"url": "https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d"}], "title": "drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO", "id": "2502393", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502393"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO\nkvcalloc(args->num_entries, sizeof(*vm_entries), GFP_KERNEL) at\namdgpu_gem.c:1050 uses the user-supplied num_entries directly without\nany upper bounds check. Since num_entries is a __u32 and\nsizeof(drm_amdgpu_gem_vm_entry) is 32 bytes, a large num_entries\nproduces an allocation exceeding INT_MAX, triggering\nWARNING in __kvmalloc_node_noprof(), causing a kernel WARNING,\nTAINT_WARN, and panic on CONFIG_PANIC_ON_WARN=y systems.\nAdd a size bounds check before we invoke the kvzalloc() to\nreject oversized num_entries early with -EINVAL.\n(cherry picked from commit 1fe7bf5457f6efd7be60b17e23163ba54341d73d)", "A flaw was found in the `drm/amdgpu` component of the Linux kernel. A local attacker can exploit an integer overflow vulnerability by providing an excessively large value for the `num_entries` parameter in the `GEM_OP GET_MAPPING_INFO` ioctl. This can lead to an attempt to allocate an extremely large amount of memory, resulting in a kernel warning, system taint, and potentially a system panic, causing a Denial of Service (DoS)."], "name": "CVE-2026-63878", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63878\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63878\nhttps://lore.kernel.org/linux-cve-announce/2026071938-CVE-2026-63878-d23a@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4d82724f7f2b847eb0454b1aab5450545b39abd4,f059b4c493df3e54fe3ffe4658009c31864275da)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4d82724f7f2b847eb0454b1aab5450545b39abd4,967a00b8e06a7734aded23861faba9ee2462be87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4d82724f7f2b847eb0454b1aab5450545b39abd4,a1ba4594232c87c3b8defd6f89a2e40f8b08395d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-21T13:45:03.647129+00:00", "updated": "2026-07-22T19:00:15.553238+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}